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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-05-20 08:26:22 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-05-20 07:51:21 -0700 |
| commit | 86aaf4fd4ea25ddde05772d03b93dbce23c0ead1 (patch) | |
| tree | c959928776c649efa87842db6243460633591681 /include | |
| parent | 7f84133af6aaa86e9ef0e9e1970655439a8cf3a1 (diff) | |
| download | linux-86aaf4fd4ea25ddde05772d03b93dbce23c0ead1.tar.gz linux-86aaf4fd4ea25ddde05772d03b93dbce23c0ead1.tar.bz2 linux-86aaf4fd4ea25ddde05772d03b93dbce23c0ead1.zip | |
x86: clarify use of _PAGE_CHG_MASK
_PAGE_CHG_MASK is defined as the set of bits not updated by
pte_modify(); specifically, the pfn itself, and the Accessed and Dirty
bits (which are updated by hardware).
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Tested-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-x86/pgtable.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h index 55c3a0e3a8ce..b816134f753a 100644 --- a/include/asm-x86/pgtable.h +++ b/include/asm-x86/pgtable.h @@ -57,6 +57,7 @@ #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | \ _PAGE_DIRTY) +/* Set of bits not changed in pte_modify */ #define _PAGE_CHG_MASK (PTE_MASK | _PAGE_PCD | _PAGE_PWT | \ _PAGE_ACCESSED | _PAGE_DIRTY) |